Where as the choice of a comparison date has no effect on the answer obtained with compound interest, the same can not be said of simple interest. find the amount to be paid at the end of 10 years which is equivalent to two payments of 100 each, the first to be paid immediately and the second to be paid at the end of 5 years. assume 5% simple interest is earned from the date each payment is made and use a comparison date of the end of 10 years